18996978680

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{2069}}^1$

素因数の和:2265

約数の個数: 128

約数和(自身を含む): 44908732800

約数和(自身を除く): 25911754120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 61, 71, 106, 122, 142, 212, 244, 265, 284, 305, 355, 424, 488, 530, 568, 610, 710, 1060, 1220, 1420, 2069, 2120, 2440, 2840, 3233, 3763, 4138, 4331, 6466, 7526, 8276, 8662, 10345, 12932, 15052, 16165, 16552, 17324, 18815, 20690, 21655, 25864, 30104, 32330, 34648, 37630, 41380, 43310, 64660, 75260, 82760, 86620, 109657, 126209, 129320, 146899, 150520, 173240, 219314, 229543, 252418, 293798, 438628, 459086, 504836, 548285, 587596, 631045, 734495, 877256, 918172, 1009672, 1096570, 1147715, 1175192, 1262090, 1468990, 1836344, 2193140, 2295430, 2524180, 2937980, 4386280, 4590860, 5048360, 5875960, 6689077, 7785647, 8960839, 9181720, 13378154, 15571294, 17921678, 26756308, 31142588, 33445385, 35843356, 38928235, 44804195, 53512616, 62285176, 66890770, 71686712, 77856470, 89608390, 133781540, 155712940, 179216780, 267563080, 311425880, 358433560, 474924467, 949848934, 1899697868, 2374622335, 3799395736, 4749244670, 9498489340, 18996978680]

約数ペア:

[(1, 18996978680), (2, 9498489340), (4, 4749244670), (5, 3799395736), (8, 2374622335), (10, 1899697868), (20, 949848934), (40, 474924467), (53, 358433560), (61, 311425880), (71, 267563080), (106, 179216780), (122, 155712940), (142, 133781540), (212, 89608390), (244, 77856470), (265, 71686712), (284, 66890770), (305, 62285176), (355, 53512616), (424, 44804195), (488, 38928235), (530, 35843356), (568, 33445385), (610, 31142588), (710, 26756308), (1060, 17921678), (1220, 15571294), (1420, 13378154), (2069, 9181720), (2120, 8960839), (2440, 7785647), (2840, 6689077), (3233, 5875960), (3763, 5048360), (4138, 4590860), (4331, 4386280), (6466, 2937980), (7526, 2524180), (8276, 2295430), (8662, 2193140), (10345, 1836344), (12932, 1468990), (15052, 1262090), (16165, 1175192), (16552, 1147715), (17324, 1096570), (18815, 1009672), (20690, 918172), (21655, 877256), (25864, 734495), (30104, 631045), (32330, 587596), (34648, 548285), (37630, 504836), (41380, 459086), (43310, 438628), (64660, 293798), (75260, 252418), (82760, 229543), (86620, 219314), (109657, 173240), (126209, 150520), (129320, 146899)]