18891700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 44129120

約数和(自身を除く): 25237420

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 61, 76, 95, 100, 122, 163, 190, 244, 305, 326, 380, 475, 610, 652, 815, 950, 1159, 1220, 1525, 1630, 1900, 2318, 3050, 3097, 3260, 4075, 4636, 5795, 6100, 6194, 8150, 9943, 11590, 12388, 15485, 16300, 19886, 23180, 28975, 30970, 39772, 49715, 57950, 61940, 77425, 99430, 115900, 154850, 188917, 198860, 248575, 309700, 377834, 497150, 755668, 944585, 994300, 1889170, 3778340, 4722925, 9445850, 18891700]

約数ペア:

[(1, 18891700), (2, 9445850), (4, 4722925), (5, 3778340), (10, 1889170), (19, 994300), (20, 944585), (25, 755668), (38, 497150), (50, 377834), (61, 309700), (76, 248575), (95, 198860), (100, 188917), (122, 154850), (163, 115900), (190, 99430), (244, 77425), (305, 61940), (326, 57950), (380, 49715), (475, 39772), (610, 30970), (652, 28975), (815, 23180), (950, 19886), (1159, 16300), (1220, 15485), (1525, 12388), (1630, 11590), (1900, 9943), (2318, 8150), (3050, 6194), (3097, 6100), (3260, 5795), (4075, 4636)]