21000470440

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{167}}^1\times {\mathrm{66889}}^1$

素因数の和:67114

約数の個数: 64

約数和(自身を含む): 48546086400

約数和(自身を除く): 27545615960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 167, 188, 235, 334, 376, 470, 668, 835, 940, 1336, 1670, 1880, 3340, 6680, 7849, 15698, 31396, 39245, 62792, 66889, 78490, 133778, 156980, 267556, 313960, 334445, 535112, 668890, 1337780, 2675560, 3143783, 6287566, 11170463, 12575132, 15718915, 22340926, 25150264, 31437830, 44681852, 55852315, 62875660, 89363704, 111704630, 125751320, 223409260, 446818520, 525011761, 1050023522, 2100047044, 2625058805, 4200094088, 5250117610, 10500235220, 21000470440]

約数ペア:

[(1, 21000470440), (2, 10500235220), (4, 5250117610), (5, 4200094088), (8, 2625058805), (10, 2100047044), (20, 1050023522), (40, 525011761), (47, 446818520), (94, 223409260), (167, 125751320), (188, 111704630), (235, 89363704), (334, 62875660), (376, 55852315), (470, 44681852), (668, 31437830), (835, 25150264), (940, 22340926), (1336, 15718915), (1670, 12575132), (1880, 11170463), (3340, 6287566), (6680, 3143783), (7849, 2675560), (15698, 1337780), (31396, 668890), (39245, 535112), (62792, 334445), (66889, 313960), (78490, 267556), (133778, 156980)]