20921241620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{227}}^1\times {\mathrm{409}}^1\times {\mathrm{593}}^1$

素因数の和:1257

約数の個数: 96

約数和(自身を含む): 46642780800

約数和(自身を除く): 25721539180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 227, 380, 409, 454, 593, 818, 908, 1135, 1186, 1636, 2045, 2270, 2372, 2965, 4090, 4313, 4540, 5930, 7771, 8180, 8626, 11267, 11860, 15542, 17252, 21565, 22534, 31084, 38855, 43130, 45068, 56335, 77710, 86260, 92843, 112670, 134611, 155420, 185686, 225340, 242537, 269222, 371372, 464215, 485074, 538444, 673055, 928430, 970148, 1212685, 1346110, 1764017, 1856860, 2425370, 2557609, 2692220, 3528034, 4608203, 4850740, 5115218, 7056068, 8820085, 9216406, 10230436, 12788045, 17640170, 18432812, 23041015, 25576090, 35280340, 46082030, 51152180, 55055899, 92164060, 110111798, 220223596, 275279495, 550558990, 1046062081, 1101117980, 2092124162, 4184248324, 5230310405, 10460620810, 20921241620]

約数ペア:

[(1, 20921241620), (2, 10460620810), (4, 5230310405), (5, 4184248324), (10, 2092124162), (19, 1101117980), (20, 1046062081), (38, 550558990), (76, 275279495), (95, 220223596), (190, 110111798), (227, 92164060), (380, 55055899), (409, 51152180), (454, 46082030), (593, 35280340), (818, 25576090), (908, 23041015), (1135, 18432812), (1186, 17640170), (1636, 12788045), (2045, 10230436), (2270, 9216406), (2372, 8820085), (2965, 7056068), (4090, 5115218), (4313, 4850740), (4540, 4608203), (5930, 3528034), (7771, 2692220), (8180, 2557609), (8626, 2425370), (11267, 1856860), (11860, 1764017), (15542, 1346110), (17252, 1212685), (21565, 970148), (22534, 928430), (31084, 673055), (38855, 538444), (43130, 485074), (45068, 464215), (56335, 371372), (77710, 269222), (86260, 242537), (92843, 225340), (112670, 185686), (134611, 155420)]