25421240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:157

約数の個数: 128

約数和(自身を含む): 67737600

約数和(自身を除く): 42316360

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 31, 38, 40, 52, 62, 65, 76, 83, 95, 104, 124, 130, 152, 155, 166, 190, 247, 248, 260, 310, 332, 380, 403, 415, 494, 520, 589, 620, 664, 760, 806, 830, 988, 1079, 1178, 1235, 1240, 1577, 1612, 1660, 1976, 2015, 2158, 2356, 2470, 2573, 2945, 3154, 3224, 3320, 4030, 4316, 4712, 4940, 5146, 5395, 5890, 6308, 7657, 7885, 8060, 8632, 9880, 10292, 10790, 11780, 12616, 12865, 15314, 15770, 16120, 20501, 20584, 21580, 23560, 25730, 30628, 31540, 33449, 38285, 41002, 43160, 48887, 51460, 61256, 63080, 66898, 76570, 82004, 97774, 102505, 102920, 133796, 153140, 164008, 167245, 195548, 205010, 244435, 267592, 306280, 334490, 391096, 410020, 488870, 635531, 668980, 820040, 977740, 1271062, 1337960, 1955480, 2542124, 3177655, 5084248, 6355310, 12710620, 25421240]

約数ペア:

[(1, 25421240), (2, 12710620), (4, 6355310), (5, 5084248), (8, 3177655), (10, 2542124), (13, 1955480), (19, 1337960), (20, 1271062), (26, 977740), (31, 820040), (38, 668980), (40, 635531), (52, 488870), (62, 410020), (65, 391096), (76, 334490), (83, 306280), (95, 267592), (104, 244435), (124, 205010), (130, 195548), (152, 167245), (155, 164008), (166, 153140), (190, 133796), (247, 102920), (248, 102505), (260, 97774), (310, 82004), (332, 76570), (380, 66898), (403, 63080), (415, 61256), (494, 51460), (520, 48887), (589, 43160), (620, 41002), (664, 38285), (760, 33449), (806, 31540), (830, 30628), (988, 25730), (1079, 23560), (1178, 21580), (1235, 20584), (1240, 20501), (1577, 16120), (1612, 15770), (1660, 15314), (1976, 12865), (2015, 12616), (2158, 11780), (2356, 10790), (2470, 10292), (2573, 9880), (2945, 8632), (3154, 8060), (3224, 7885), (3320, 7657), (4030, 6308), (4316, 5890), (4712, 5395), (4940, 5146)]