21528780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3943}}^1$

素因数の和:3975

約数の個数: 96

約数和(自身を含む): 74210304

約数和(自身を除く): 52681524

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 182, 195, 210, 260, 273, 364, 390, 420, 455, 546, 780, 910, 1092, 1365, 1820, 2730, 3943, 5460, 7886, 11829, 15772, 19715, 23658, 27601, 39430, 47316, 51259, 55202, 59145, 78860, 82803, 102518, 110404, 118290, 138005, 153777, 165606, 205036, 236580, 256295, 276010, 307554, 331212, 358813, 414015, 512590, 552020, 615108, 717626, 768885, 828030, 1025180, 1076439, 1435252, 1537770, 1656060, 1794065, 2152878, 3075540, 3588130, 4305756, 5382195, 7176260, 10764390, 21528780]

約数ペア:

[(1, 21528780), (2, 10764390), (3, 7176260), (4, 5382195), (5, 4305756), (6, 3588130), (7, 3075540), (10, 2152878), (12, 1794065), (13, 1656060), (14, 1537770), (15, 1435252), (20, 1076439), (21, 1025180), (26, 828030), (28, 768885), (30, 717626), (35, 615108), (39, 552020), (42, 512590), (52, 414015), (60, 358813), (65, 331212), (70, 307554), (78, 276010), (84, 256295), (91, 236580), (105, 205036), (130, 165606), (140, 153777), (156, 138005), (182, 118290), (195, 110404), (210, 102518), (260, 82803), (273, 78860), (364, 59145), (390, 55202), (420, 51259), (455, 47316), (546, 39430), (780, 27601), (910, 23658), (1092, 19715), (1365, 15772), (1820, 11829), (2730, 7886), (3943, 5460)]