81306840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:457

約数の個数: 128

約数和(自身を含む): 258163200

約数和(自身を除く): 176856360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 46, 60, 69, 89, 92, 115, 120, 138, 178, 184, 230, 267, 276, 331, 345, 356, 445, 460, 534, 552, 662, 690, 712, 890, 920, 993, 1068, 1324, 1335, 1380, 1655, 1780, 1986, 2047, 2136, 2648, 2670, 2760, 3310, 3560, 3972, 4094, 4965, 5340, 6141, 6620, 7613, 7944, 8188, 9930, 10235, 10680, 12282, 13240, 15226, 16376, 19860, 20470, 22839, 24564, 29459, 30452, 30705, 38065, 39720, 40940, 45678, 49128, 58918, 60904, 61410, 76130, 81880, 88377, 91356, 114195, 117836, 122820, 147295, 152260, 176754, 182712, 228390, 235672, 245640, 294590, 304520, 353508, 441885, 456780, 589180, 677557, 707016, 883770, 913560, 1178360, 1355114, 1767540, 2032671, 2710228, 3387785, 3535080, 4065342, 5420456, 6775570, 8130684, 10163355, 13551140, 16261368, 20326710, 27102280, 40653420, 81306840]

約数ペア:

[(1, 81306840), (2, 40653420), (3, 27102280), (4, 20326710), (5, 16261368), (6, 13551140), (8, 10163355), (10, 8130684), (12, 6775570), (15, 5420456), (20, 4065342), (23, 3535080), (24, 3387785), (30, 2710228), (40, 2032671), (46, 1767540), (60, 1355114), (69, 1178360), (89, 913560), (92, 883770), (115, 707016), (120, 677557), (138, 589180), (178, 456780), (184, 441885), (230, 353508), (267, 304520), (276, 294590), (331, 245640), (345, 235672), (356, 228390), (445, 182712), (460, 176754), (534, 152260), (552, 147295), (662, 122820), (690, 117836), (712, 114195), (890, 91356), (920, 88377), (993, 81880), (1068, 76130), (1324, 61410), (1335, 60904), (1380, 58918), (1655, 49128), (1780, 45678), (1986, 40940), (2047, 39720), (2136, 38065), (2648, 30705), (2670, 30452), (2760, 29459), (3310, 24564), (3560, 22839), (3972, 20470), (4094, 19860), (4965, 16376), (5340, 15226), (6141, 13240), (6620, 12282), (7613, 10680), (7944, 10235), (8188, 9930)]