21203180

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{241}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 46103904

約数和(自身を除く): 24900724

約数列:

[1, 2, 4, 5, 10, 20, 53, 83, 106, 166, 212, 241, 265, 332, 415, 482, 530, 830, 964, 1060, 1205, 1660, 2410, 4399, 4820, 8798, 12773, 17596, 20003, 21995, 25546, 40006, 43990, 51092, 63865, 80012, 87980, 100015, 127730, 200030, 255460, 400060, 1060159, 2120318, 4240636, 5300795, 10601590, 21203180]

約数ペア:

[(1, 21203180), (2, 10601590), (4, 5300795), (5, 4240636), (10, 2120318), (20, 1060159), (53, 400060), (83, 255460), (106, 200030), (166, 127730), (212, 100015), (241, 87980), (265, 80012), (332, 63865), (415, 51092), (482, 43990), (530, 40006), (830, 25546), (964, 21995), (1060, 20003), (1205, 17596), (1660, 12773), (2410, 8798), (4399, 4820)]