20380100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 48595848

約数和(自身を除く): 28215748

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 61, 65, 100, 122, 130, 244, 257, 260, 305, 325, 514, 610, 650, 793, 1028, 1220, 1285, 1300, 1525, 1586, 2570, 3050, 3172, 3341, 3965, 5140, 6100, 6425, 6682, 7930, 12850, 13364, 15677, 15860, 16705, 19825, 25700, 31354, 33410, 39650, 62708, 66820, 78385, 79300, 83525, 156770, 167050, 203801, 313540, 334100, 391925, 407602, 783850, 815204, 1019005, 1567700, 2038010, 4076020, 5095025, 10190050, 20380100]

約数ペア:

[(1, 20380100), (2, 10190050), (4, 5095025), (5, 4076020), (10, 2038010), (13, 1567700), (20, 1019005), (25, 815204), (26, 783850), (50, 407602), (52, 391925), (61, 334100), (65, 313540), (100, 203801), (122, 167050), (130, 156770), (244, 83525), (257, 79300), (260, 78385), (305, 66820), (325, 62708), (514, 39650), (610, 33410), (650, 31354), (793, 25700), (1028, 19825), (1220, 16705), (1285, 15860), (1300, 15677), (1525, 13364), (1586, 12850), (2570, 7930), (3050, 6682), (3172, 6425), (3341, 6100), (3965, 5140)]